Rope-grip



W. TRAVELL.

ROPE GRIP.

APPLICATION FILED MAY 8, I919- Patented Nov. 15, 1921a flmlmmrlllllni IINVENTOR,

WITNESSES.

WARREN TBAVELL,

OF NEW YORK, N. Y.

ROPE-GRIP.

Application filed May 8,

1 '0 all whom a may concern:

Be it known that I, lVAnnnN TnAvnLL, a citizen of the United States, andresident of city of New York, in the county of New York and State oi NewZork, have invented certain new and useful Improvements in Hope-Grips,or" which the following is a specification.

This invention relates in general to improvements in rope clampingdevices.

More particularly it relates to that class of rope-grips, which utilizesthe frictional resistance caused by pressure oi gripping surfaces uponthe rope to attain the clamping action.

The objects of the invention are to produce an effective means "forarresting the traveling motion of ropes in hoisting and transportingmachinery at the will of the operator in a more efficient way thanheretofore.

In order to show how the device may be used and also to explain moreclearly its mode of operation, the description to follow should be readin conjunction with my U. S. Letters Patent No. 1,184,051, hoisting andtransporting mechanism, issued May 23rd, 1916. It is in efl'ect animprovement over the rope grip shown in Figures 4 and 5, and fullydescribed as to its function and opera tion, but not specificallyclaimed under said Letters Patent.

The accompanying drawing illustrates only one way in which I attain theaim of my invention, but it will be understood that other equivalentmeans may be used and that either hand-power, electrical or mechanicalmeans may be utilized as primemover in producing the pressure andfrictional resistance necessary to prevent the motion of the rope.

With the aforesaid objects in view, the invention consists of theimprovements, novel construction, arrangement and combination ofelements hereinafter described, defined in subjoined claims andillustrated in the annexed drawings, wherein like elements aredesignatedby the same reference characters throughout the several views.

In the said drawings,

Fig. 1 is an elevation of the rope grip, wherein the ropes are shownbroken and the two main parts brought closer together than will bepractical in actual operation,

Fig. 2 is a sectional elevation on line 2-2 of Fig. 1,

Specification of Letters Eatent.

Patented NOV. 15, 1921.

1919. Serial No. 295,758.

3 is a section on line 33 of Fig. 1 and Fig. 4 is a section on line 4 4of Fig. 3. [is shown in the said figures, the device may be said toconsist essentially of adjustable toggles operated'by means ofropeleverage on sheaves.

In the various views ropes 1 and 2 I'GPITG." sent the counterweight ropeand traveling rope, corresponding to ropes 31 and 23 respectively, whichmay be alternately clamped as shown in Figs. 3, 4 and 5 of the abovementioned reference patent. For the purpose of controlling the motion ofsaid ropes, the sheaves 3 and 4 are operatively connected by a rope 5,preferably dead ended or clamped on said sheaves so as to preventslipping. A hand-lever 6 with spring lock and the sheave 3 revolvetogether on pin 7, said pin being supported on bracket 8 and thequadrant 9. In operating the hand-lever 6, sheave 3 will rotate sheave 4by means of rope 5, causing gears 10, 11 and 12 to rotate theirrespective shafts upon which are rigidly fixed the toggle-wheels 13, 14and 15. In the recesses of the togglewheels are pivoted the clampsproper 16, connected in pairs by means of guide-links 17, to insureparallel motion and uniform pressure on the rope. The clamps are groovedon both sides to fit the rope and are reversible, thus. doubling theallowable wear. The toggle-wheels are provided with a series or holes,arranged to permit 01' adjustment for different sizes of rope or tocompensate for wear of the clamps. The upper half of the device is heldtogether as a unit by means of a frame 18, which may be bolted to anyconvenient part of the structure.

It will readily be seen that either of ropes 1 or 2 may be clamped bythrowing the hand-lever 6 to the left or right, or both ropes may befree to travel if the lever be left in an intermediate position.

As illustrated in Figs. 1, 2 and 4 the ropes are assumed to travel in adownward direction under load, as shown by arrows. The clamps should beso adjusted that when gripping the rope, the pins connecting the clampsproper to the toggle-wheels 13, 14 and 15 will not be permittedtodescend below a horizontal line through the center line of the shaftscarrying the toggle-wheels.

It will be understood that changes in form, arrangement, sizes,proportions and details of the device may be made without departing fromthe scope of the invention as defined by the appended claims, also thatany other means than handpower may be used as prime-mover for actuatingthe grip.

Having described my invention, What I desire to secure by Letters Patentand claim is 7 1. A double rope grip compriling friction jaws;toggle-wheels whereon said fric tion aws are suitably mounted, forvarying the pressure between said friction jaws and the ropes andadapted to'positively release either one of tworopes when gripping theother rope; and means for applying power to and controlling the motionof said toggle wheels.

2. A double rope grip comprising two pairs of friction jaws; togglewheels whereon said friction jaws are suitably mounted; means formaintaining said friction jaws parallel with the ropes; and means foractuating said toggle wheels whereby clamping pressure is appliedthrough either pair of said friction jaws to its included rope andwhereby at the same time the other rope is released from the clampingpressure of 'its pair of friction jaws.

In a double rope grip, the combination of two pairs of friction jaws;toggle wheels whereon said friction jaws are suitably mounted; gearingwhereby said toggle wheels are actuated; a lever; and a system of linksconnecting said lever with said gearing, the whole constitu-tinga meansfor applying gripping pressure on the rope passing'between each pair ofjaws andfor positively releasing from gripping pressure either ropewhensuchpressure is applied to the other rope. V

4. In a rope grip, the combination of two pairs of friction jaws; togglemembers 'whereon said friction jaws are mounted;

means for maintaining each pair of friction jaws parallel with itsengaged rope; gearing operatively connecting said toggle members; alever; and a rope operatively connecting said lever with said gearing,the whole constitutinga means for applying 'day of February, A. D. 1919.7 g

WARREN RAV L,

gripping pressure between the pairs of friction jaws and theirrespective ropes and for positively releasing from such grippingpressure either of the two ropes when the other rope is gripped.

5. In a double rope grip, the combination of two pairs of friction jaws,each pair of which is adapted to apply gripping pressure to a rope whichpasses between its jaws; three disks, upon which the friction jaws arepivotally and eccentrically mount ed so as to obtain a toggle. action inthe ap plication of pressure to the ropes; shafts to which the disks areattached; a supporting frame; means whereby either grip is thrown out ofoperation whenever the other grip is put in operation; and means forapplying pressure between the grips and their respective ropes.

6. In a double rope grip, the combination of two pairs of grip jaws;three rotating members on which said jaws are mounted eccentrically;means for gearing these rotating members together so that when the jawsof one pair are coming together, the jaws of the other pair areseparating; and actuating means for rotating these members, wherebygripping pressure is exerted between either pair of jaws and an includedrope.

7. In a double rope grip, the combination of two pairs of grip jaws;rotating members on which said jaws are mounted eccentrically; means forgearing these rotating members together so that when the jaws of onepair are coming together, the jaws of the other pair are separatlng;sheaves operatively connected to said gearing; a lever; and rope passingaround said sheaves, and operatively connectingthem .to said lever,whereby movement of the lever rotates these members and grippingpressure is exerted between either pair of jaws and an included rope.

Signed at New York and State of New York this New York city in thecounty of i

